His experiences as a cryptanalyst during World War II. U.S. Naval Academy, 1930-34. Qualities of a good cryptanalyst; Japanese language training in Tokyo, 1939-40; evacuation from Tokyo, August, 1941; assignment to HYPO, Pearl Harbor; impressions of…

His experiences as a naval officer assigned to the Combat Intelligence Unit, Pearl Harbor, during World War II. Assignment to Station HYPO, February, 1942; comments about Joseph Rochefort, Jasper Holmes, Edwin Layton, and Chester Nimitz; comments…